#include<stdio.h>
#include<sys/types.h>
#include<unistd.h>

int main()
{
    //chdir("/home/shh/Linus_study");
    //FILE* pf = fopen("log.txt","w");
    //(void)pf; 
    while(1)
    {
        sleep(1);
        printf("I am a process,pid:%d\n",getpid());
    }
    return 0 ;
}
